Answer:
13
Step-by-step explanation:
Given: a*b=2a-3b
To find: 2*(-3)
Solution:
Numbers that are used for counting are known as natural numbers. Number along with the digit 0 are known as whole numbers.
In the question, [tex]*[/tex] is used to define relation between a and b as [tex]a*b=2a-3b[/tex]
To find 2*(-3), use the given condition: a*b=2a-3b
Put [tex]a=2,b=-3[/tex]
[tex]2*(-3)=2(2)-3(-3)=4+9=13[/tex]
Given that a*b = 2a-3b,then 2*(-3)= 13
The given binary operation is:
a*b = 2a - 3b
Applying this binary operation to 2*(-3), we are going to substitute a = 2 and b = -3 into the binary operation a*b = 2a - 3b
If a = 2 and b = -3:
2*(-3) = 2(2) - 3(-3)
2*(-3) = 4 + 9
2*(-3) = 13
Therefore, given that a*b = 2a-3b,then 2*(-3)= 13
Learn more here: https://brainly.com/question/16827196
Angle bisectors. I need help on how to solve.
Answer:
identify if the angle is a right angle, if it is bisected it means both sides are the same, set both equations equal to each other or add them up and set them equal to 90 or 180
Step-by-step explanation:
that is the explanation.
Based on the box-and-whisker plots shown below, which of the following statements is true?
77
75
+
76
+
78
79
80
81
82
83
Group A -
Group B
The median of Group A is less than that of Group B.
The range of Group A is less than that of Group B.
The lower quartile of youp A is less than that of Group B.
Answer:
The median of Group A is less than that of Group B.
Step-by-step explanation:
Assume that your box-and-whisker plots look like those below.
1. Compare medians
Group A = 79
Group B = 79.5
The median of Group A is less than that of B
Correct.
2. Compare ranges
Group A: 82 - 76 = 6
Group B: 81 - 76 = 5
The range of Group A is greater than that of Group B.
Option B is wrong.
3. Compare Q1s
Group A: 78
Group B: 77
Q1 for Group A is less than that for Group B.
Option C is wrong.
in a survey of students 60% were in high school in 40% were in middle school of the high school students 30% had visited a foreign country if a survey of student is selected at random what is the probability that the student is in high school and has visited a foreign country?
Answer:
0.18
Step-by-step explanation:
Given: 60% students were in high school, 40% were in middle school and of the high school students, 30% had visited a foreign country
To find: probability that the student is in high school and has visited a foreign country
Solution:
Let x denotes total number of students
Number of students in high school = 60% of x = [tex]\frac{60}{100}x[/tex]
Number of students in middle school = 40% of x = [tex]\frac{40}{100}x[/tex]
Number of students who are in high school and have visited foreign country = 30% of Number of students in high school = [tex]\frac{30}{100}(\frac{60}{100})x=\frac{18}{100}x[/tex]
Probability that the student is in high school and has visited a foreign country = Number of students who are in high school and have visited foreign country/ Total number of students = [tex]\frac{\frac{18}{100}x}{x}=\frac{18}{100}=0.18[/tex]
For which distributions is the median the best measure of center?
Answer:
D
Step-by-step explanation:
It is the organized one with the center bar also being the largest value.
Using the properties of a kite, what is the measure of Angle X? 70° 90° 130° 140°
Answer:
70°
Step-by-step explanation:
Properties of a kite are:
a) They have two congruent sides
b) Their diagonal is perpendicular to each other.
c) On a kite, we also have two angles that are opposite and congruent to each other. These angles are the same
We would be using the property of a kite that says "On a kite, we also have two angles that are opposite and congruent to each other. These angles are the same" to solved this question.
In the diagram , the angles Z and X are opposite and congruent to one another. This means they are equal to each other.
Since angles Z= angle X
Let us call both of them angle a
Since a Kite is a Quadrilateral shape, the sum of angles in a Quadrilateral = 180°
Angle W = 90°
Angle Y = 130°
Angle X = a°
Angle Z = a°
Hence,
90° + 130° + a° + a° = 360°
220° + 2a° = 360°
2a° = 360° - 220°
2a° = 140°
a° = 140/2
a° = 70°
Therefore, from the calculation above, we can say that the measure of x = 70°
Answer:
70°
Step-by-step explanation:
Properties of a kite are:
a) They have two congruent sides
b) Their diagonal is perpendicular to each other.
c) On a kite, we also have two angles that are opposite and congruent to each other. These angles are the same
The graph of the function f(x) = 5 cos (2x) is a reflection over the x-axis of the graph of g(x) =
Answer:
[tex]g(x)=-5\cos (2x)[/tex]
Step-by-step explanation:
The given function is
[tex]f(x)=5\cos (2x)[/tex]
If a function reflected over the x-axis, then x-coordinate remains same but the sign of y-coordinate is changed.
[tex]P(x,y)\Rightarrow P'(x,-y)[/tex]
If function f(x) is a reflection over the x-axis to get the of g(x), then the resultant function is
[tex]g(x)=-f(x)[/tex]
Substituting the value of function f(x), we get
[tex]g(x)=-5\cos (2x)[/tex]
Therefore, the required function is [tex]g(x)=-5\cos (2x)[/tex].
which binomial is a factor of X^3 - 3x^2 - 28x
a) x - 4
b) x^2 - 4
c) x - 7
d) x^2 - 7
Help plz with this assignment
find the axis of symmetry for this parabola y=-2x^2-4x-11
write your answer as an equation
Answer:
x = - 1
Step-by-step explanation:
Given a parabola in standard form
y = ax² + bx + c ( a ≠ 0 ) , then the equation of the axis of symmetry is
x = - [tex]\frac{b}{2a}[/tex]
y = - 2x² - 4x - 11 ← is in standard form
with a = - 2 and b = - 4 , thus
x = - [tex]\frac{-4}{-4}[/tex] = - 1
x = - 1 is the equation of the axis of symmetry
The concession stand at the high school football stadium sells hot dogs and sodas. Jack bought 3 hotdogs and 2 sodas for a total of $12. Angie bought 1 hotdog and 4 sodas for $9. Solve a system of equations to determine the cost of 1 hotdog and 1 soda.
Answer: each soda costs $1.5 and each hotdog costs $3.
Step-by-step explanation:
If H is the price for one hotdog and S is the price for one soda, we have the equations:
for Jack.
3*H + 2*S = $12
For Angie.
1*H + 4*S = $9
Now we can isolate one of the variables in one of the equations and then replace it in the other equation, let's isolate H in the second equation:
H = $9 - 4*S
now we replace it in the first eq
3*H + 2*S = $12
3*($9 - 4*S) + 2*S = $12
$27 - 12*S + 2*S = $12
-10*S = $12 - $27 = -$15
S = $15/10 = $1.5
Now we can replace it in the equation for H and get:
H = $9 - 4*$1.5 = $3
So each soda costs $1.5 and each hotdog costs $3.
Answer: One hotdog cost $3 and One soda costs $1.5
Step-by-step explanation:
Let hotdogs be denoted by h
Let sodas be denoted as s
Jack bought 3 hotdogs and 2 sodas for a total of $12. This can be written as:
3h + 2s = 12
Angie bought 1 hotdog and 4 sodas for $9. This can be written as:
h + 4s = 9
3h + 2s = 12
h + 4s = 9
1 × (3h + 2s = 12)
3 × (h + 4s = 9)
3h + 2s = 12
3h + 12s = 27
Subtract the equation
-10s = -15
s = -15/-10
s = 1.5
One soda cost $1.5
Since h + 4s = 9
h + 4(1.5) = 9
h = 9 - 6
h = 3
One hotdog costs $3
12.48 ÷ 7.6
[tex]12.48 \div 7.6 [/tex]
Answer:
2.08
Step-by-step explanation:
12.48 ÷ 6
= 2.08
Answer:
Hi
Answer:
= 1.6
Carmine wants to know how many square feet of carpeting he will need to buy to cover his family room floor. Which geometric measure does Carmine need to find?
Answer:multiply the width and depth of the roomStep-by-step explanation:
the horizontal and vertical dimension
I need help - geometry (the bottom are answer choices- and I clicked that one by accident)
Answer:
the anwer is D: 44,44,92
Step-by-step explanation:
2n+10=4n+2 ---->8=2n ------> n=4
11n=11(4)=44
m<N=m<L=44
180-44-44=92
I need help ASAP I’ll give brainliest to that person :)
Answer:
3
Step-by-step explanation:
first work out wax used for cone using formula
1/3 x 3.14 x r squared x height
using this the total for the candle must be 113
formula for a sphere is 4/3 x 3.14 x r cubed
so we know 113 /3.14 / 4/3 = r cubed
cube root 27 = 3
i need to find the volume
Answer: 3.83m^3
Step-by-step explanation:
Use formula for volume of a triangular prism (Area of triangle times length of the figure)
Answer:
6
Step-by-step explanation:
idk i just added them all together
Please answer correctly !!!! Will mark brianliest !!!!!!!!!!!!!!
Answer:
x - 5
Step-by-step explanation:
Again, we can just write the width as (x² - 25) / (x + 5) which will be x - 5.
Answer:
area = length x width
x² - 25 = x + 5 · width
(x - 5)(x + 5) = (x + 5)w
(x - 5)(x + 5) / (x + 5) = (x + 5)w / (x + 5)
x - 5 = w
Step-by-step explanation:
1. write down the formula of area.
2. since the area is a difference of squares, factor them into two binomials, and replace the length by its measure. you can use w for width
3. to get width, divide the one of the binomials with the length that matches together to get w.
What is the most significant digit of the number 546?
Answer:
5
Step-by-step explanation:
my answer is 5
6 is the least significant
Seth sold 20% of his baseball cards during week one. During week two, he bought 20% more cards than he had after week one. If he now has 10 fewer cards, how many cards did he have originally? (he had more than 100 cards originally.)
Answer:
250 cards
Step-by-step explanation:
Let the number of baseball cards he originally had be x.
He sold 20% of the baseball cards after week one. This means that after week one the number of cards he had was:
x - (20/100 * x) = x - 0.2x = 0.8x
During week two he bought 20% more cards than he had after week one. This means that after week two, he had:
0.8x + (20/100 * 0.8x)
= 0.8x + (0.2 * 0.8x)
= 0.8x + 0.16x = 0.96x
He now has 10 fewer cards. This means that:
x - 10 = 0.96x
Collecting like terms:
x - 0.96x = 10
0.04x = 10
=> x = 10/0.04 = 250
He had 250 cards originally.
(9x+9)+(8c−5) Whats the answer?
Solution,
(9x+9)+(8c-5)
=9x+9+8c-5
=9x+8c+9-5
=9x+8c+4
hope it helps
Good luck on your assignment
Step-by-step explanation:
1. go to google
2. search your question
3. go to a website that tells you the answers
You got your answer. ;)
can anyone help me thanks.
Find the greatest common factor (GCF). Then, write the binomial in factored form.
3x+15
Answer:
hold up
Step-by-step explanation:
I actually need help wit all of it .
Answer:
shiiiiii this is easy ight so
A
A
B
hope it helps
Step-by-step explanation:
Line AB contains points A(4, 5) and B(9, 7). What is the slope of AB?
5
2
이를
0
2
5
N/u un un nu
Slope of AB = 7-5/9-4
=2/5
Why does (-4 1/2)^2 = 20.25? Thank you please hurry!
Answer:
See below.
Step-by-step explanation:
Squaring a number means to multiply the number by itself.
For example, 3^2 means 3 * 3.
8^2 means 8 * 8.
(-6)^2 means (-6) * (-6).
In each case above, you see that the number that is squared is multiplied by itself.
In this case, (-4.5)^2, squaring the number -4.5, means multiply the number -4.5 by the number -4.5
(-4.5)^2 = (-4.5) * (-4.5)
Now we need to actually multiply -4.5 by -4.5
When you multiply a negative number by a negative number, the result is positive, so the product of -4.5 and -4.5 is a positive number. To find that number, you multiply 4.5 by 4.5
4.5 * 4.5 = 20.25
Therefore, (-4.5)^2 = 20.25
A bag contains green yellow and black marbles out of the 100 marbles in the bag 35 marbles are green and 15 or yellow what percent of the marbles or black
Answer:
50%
Step-by-step explanation:
35 + 15 = 50
so the other half of the marbles is, 50%
Which inequality has an open circle when it is graphed on a number line?
Answer:
See below
Step-by-step explanation:
If you consider an open circle, it would exclude the value with which we have circled when writing the inequality. Hence the only possible signs with in such an example can be a greater than sign ( > ) or less than sign ( < );
Let us take a look at an example to help. We are given a graph with an open circle on the number say 3. An arrow extends to the right of this number 3;
[tex]Inequality Sign - <,\\Inequality - x > 3,\\[/tex]
Hope this helps!
Tentukan kondisi berikut yang manakah yang menunjukan kondisi rugi pemasukan rp. Pengeluaran rp a. 700.000. 900.000 b.1.100.000. 1.100.000 c.2.100.000. 2.000.000 d.1.650.000. 1.550.000 PLISSE TOLONG JAWAB YG BENER
Answer:Kelas: 7
Mapel: matematika
Kategori
: Kata kunci aritmatika sosial: laba, rugi,
Kode impas: 7.2.6 [revisi matematika kelas 7 K13 Bab 6-aritmatika sosial]
Diskusi:
dalam kegiatan atau kondisi yang kita ketahui 3 istilah, yaitu:
1. untung
2. kehilangan
3. impas.
Jika aktivitas atau kondisi keuntungan, penarikan harga lebih kecil dari entri
Harga.
Jika kondisi peristiwa atau kerugian, harga penarikan lebih besar dari entri
Harga.
Jika aktivitas atau kondisi impas, harga pengeluaran sama dengan entri
Harga.
Mari kita lihat
Pertanyaan.
Catat tabel di lampiran 2.
1. jika harga masuk RP 700.000, 00 dan harga produksinya Rp 900,000, 00, maka harga pendapatan lebih kecil dari harga pengeluaran.
Jadi, kondisi ini
Kehilangan.
Kemudian
RP 900,000-RP 700.000
, 00 = RP 200,000 Jadi, jumlah kerugian adalah RP 200,000, 00 2.
Jika harga masuk adalah Rp 1.100.000 dan biaya pengeluaran Rp 1.100,00, maka harga pendapatan sama dengan harga penarikan.
Jadi, kondisi impas
Terjadi.
3. jika harga tiket masuk RP 2.100.000 dan harga pengeluaran RP 2.000,00, maka harga masuk lebih besar dari pengeluaran
Harga.
Jadi, kondisi yang terjadi menguntungkan
.
Kemudian
RP 2.100.000-RP 2.000.000, 00 = RP 100,000 Jadi, jumlah keuntungannya RP 100,000, 00.
4. jika harga masuk RP 1.650.000 dan harga produksi RP 1.550.000, maka harga masuk lebih besar dari pengeluaran
Harga.
Jadi, kondisi yang terjadi menguntungkan
.
Kemudian
RP 1.650.000-RP 1.550.000 = RP 100,000 Jadi, jumlah keuntungannya RP 100,000, 00.
berharap ini membantu!
There are 12 bags of apples on a market stall.
The mean number of apples in each bag is 8.
The table shows the number of apples
in 11 of the bags.
Number of | Frequency
apples. |
6. 1
7. 4
8. 2
9. 3
10. 1
Calculate the number of the apples in the 12th bag
+
Note: Please make sure your final answer says.apples
There are 12 bags of apples on a market stall. The number of apples in bag 12 is 96.
What are mean?The mean is the average value which can be calculated by dividing the sum of observations by the number of observations
Mean = Sum of observations/the number of observations
It is Given that, there are 12 bags of apples on a market stall.
The mean number of apples in each bag is 8.
We need to calculate the number of apples in the 12 bags.
The mean of "n" observations is given as
Mean = Sum of observations/the number of observations
8 = sum of observations/12
The total number of apples = 8 x 12 = 96
Hence, there are 96 apples in 12 bags.
Learn more about mean;
https://brainly.com/question/17060266
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The perimeter of the rectangle is 20 cm. One side is 6 cm long. What is the length of the missing side
Answer:
it is 4cm long
Step-by-step explanation:
You multiply 6 by 2 to get 12, then subtract 12 from 20 and get 8. Then you divide 8 by 2 to get 4. If you want to check it, you can add 6+6+4+4 to get 20
Answer: 4
Step-by-step explanation: the definition of a rectangle states that opposite sides of the rectangle are congruent. this means that there is 2 sides that measure 6cm. These two sides added together give us 12cm. By working backwards, we can subtract 12cm from the perimeter (20cm), this gives us 8cm. by diving that by 2 we can find the lenght of the missing sides, 4cm each.
The mystery number is a four digit number it’s digits are 5,4,7 and 3
Answer:
Dear friend i hope the answer is 4753 which is the mystery four digit number.
Find the areas of the trapezoids. PLZ HELP!!!!
Answer:
Type 7.5 in the box!
Step-by-step explanation:
Consider the trapezoid formula ( ( base 1 + base 2 ) / 2 ) * height;
[tex]Length of Base 1 - 1 unit,\\\\Length of Base 2 - 4 units,\\\\Length of Height - 3 units ( length of x - intercept in shaded region )\\\\Area of Trapezoid = ( Average of Bases ) * Height = ( ( 1 + 4 ) / 2 ) * 3 = ( 5 / 2 ) * 3 = 7.5 square units,\\\\Solution; 7.5 square units[/tex]
Area = 7.5 square units
The area of the trapezoid is 7.5 square units.
To Find the Areas of TrapezoidsGiven: The length of base 1 = 1 unit,The length of base 2 = 4 units.
The length of height = 3 units.
Formula used and calculation:The area of the trapezoid
= (Average of the two bases) × Height
Putting all the values in the above formula, we get
The area of the trapezoid
= {(1 + 4)/2} × 3
= 7.5 square units.
Hence, the area of the trapezoid is 7.5 square units.
To learn how to find the area of the trapezoid, refer:
https://brainly.com/question/939967